Alternative to Wet leakage current test system of photovoltaic module
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Standards
The Wet Leakage Current Test System is designed to meet the requirements of the following standards:
(1) GB/T 9535 – Crystalline Silicon Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval
(2) GB/T 20047 – Photovoltaic (PV) Module Safety Qualification Requirements
(3) IEC 61215 – Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval
(4) IEC 61730 – Photovoltaic (PV) Module Safety Qualification (relevant clauses on insulation and electrical safety)
Parameters
| Item | Technical Specification |
|---|---|
| Test Tank Dimensions | 2100 × 1000 × 250 mm (W × D × H) |
| Tank Material | Acrylic (Organic Glass) |
| Tank Thickness | 15 mm |
| Water Temperature Control Range | 22 ± 3 ℃ |
| Temperature Control Method | Self-developed water constant-temperature system |
| Test Liquid Resistivity | ≤ 3500 Ω·cm |
| Spray Method | Multi-angle adjustable spray |
| Spray Nozzle Type | UL laboratory dedicated spray nozzles |
| Spray Water Pressure / Flow | Adjustable |
| Maximum Test Voltage | 0–5000 V (adjustable) |
| Leakage Current Limit | 5 mA |
| Voltage Ramp Rate | 500 V/s |
| Insulation Resistance Range | 1 MΩ – 9999 MΩ |
| Leakage Current Measurement Range | 0.001 – 5.000 mA (DC) |
Features
Fully compliant with wet leakage current test requirements specified in IEC 61215
Constant-temperature water tank ensures stable water temperature and high test repeatability
Controlled water resistivity guarantees consistency and comparability of test conditions
Multi-directional spray structure realistically simulates rain, condensation, and wet exposure
High-precision hipot tester provides accurate leakage current and insulation resistance measurements
High system integration, suitable for both type testing and batch inspection of PV modules
Robust structural design supports long-term and continuous laboratory operation
Accessories
(1) Dielectric Withstand Voltage Tester (0–5000 V output)
(2) Water Constant-Temperature System with independent control cabinet
(3) Acrylic Insulation Test Water Tank
(4) Adjustable Multi-angle Spray Frame
(5) UL Dedicated Spray Nozzles
(6) Conductivity Meter for monitoring water resistivity
(7) PV Module Sample Holder
(8) Test Water (configured according to resistivity requirements)
(9) Sensors and Probes (for periodic calibration or replacement)
Test Procedures
Prepare the test water according to standard requirements and adjust the resistivity.
Start the water temperature control system and stabilize the temperature at 22 ± 3 ℃.
Fix the photovoltaic module on the sample holder and complete electrical connections.
Activate the spray system to ensure uniform wetting of the module surface and frame.
Increase the test voltage at a controlled rate of 500 V/s until the specified value is reached.
Maintain the withstand voltage and measure leakage current and insulation resistance.
Record test results and determine compliance based on standard leakage current limits.
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